Whole Foods is investigating a credit-card security breach — here's who could be affected

The grocery chain, which Amazon acquired for $13.7 billion in late August, announced Thursday it "recently received information regarding unauthorized access of payment card information."

People who only shopped for groceries at Whole Foods should not be affected, according to the company, which said only venues such as taprooms and table-service restaurants located within stores — which use a different point-of-sales system — were affected.

"When Whole Foods Market learned of this, the company launched an investigation, obtained the help of a leading cybersecurity forensics firm, contacted law enforcement, and is taking appropriate measures to address the issue," Whole Foods said in a statement on Thursday.

"The company's investigation is ongoing and it will provide additional updates as it learns more," the statement continued. "While most Whole Foods Market stores do not have these taprooms and restaurants, Whole Foods Market encourages its customers to closely monitor their payment card statements and report any unauthorized charges to the issuing bank."

Whole Foods added that no Amazon.com purchases would be affected in the security breach.